Restarting activity in radio galaxies

Details Restarting activity in radio galaxies Restarting activity in radio galaxies

1999-09-13

arxiv.org/abs/astro-ph/9909201v1

New Astron.Rev. 46 (2002) 89-93

Astronomy and Astrophysics

Astrophysics

5 pages, 4 figures. To appear in "Life Cycles of Radio Galaxies", ed. J. Biretta et al., New Astronomy Reviews

Scientific paper

10.1016/S1387-6473(01)00161-0

We present observations of two radio galaxies, J1835+620 and 3C338, both with signs of having passed through different stages of core activity. The former presents two symmetric and bright components within a typical FR II structure, possibly resulting from two distinct phases of activity; the latter is a FR I radio galaxy with two separated regions with different age properties, possibly due to a switch-off and -on cycle in its core. In both sources, the optical counterpart lies in a group of galaxies with indications of mutual interaction, a scenario often invoked to explain triggering of core activity.

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